package com.hmall.user.interceptor;

import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.hmall.user.utils.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Slf4j
public class ItemInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.获取请求头
        String authorization = request.getHeader("authorization");
        if (StringUtils.isBlank(authorization)) {
            log.warn("非法用户访问！请求路径：{}",request.getRequestURI());
            //没有用户信息，未登录 禁止访问
            response.setStatus(403);
            return false;
        }
        //2.转换用户id
        Long userId = Long.valueOf(authorization);
        //3.存入ThreadLocal
        UserHolder.setUser(userId);
        //4.放行
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserHolder.removeUser();
    }
}
